Safety appliance for elevators



r out 26 1926 d ff ill

Patented Oct. 26, 1926.

iran sr'r 'rar vertice.,

ABRAHAM STOLLER, OF NEW YORK, N. Y.

SAFETY APPLANCE LEVATORS.

Application filed June 20,

The object of my invention is to supplement elevator safety mechanism ofthe automatic type well known in the art by auxiliary appliances withinthe control of a person in the car, so as `to preclude the possibilityof accident in case of the failure, in whoie or in part, of said usualautomatic means, under which conditions, as heretofore prevalent, theelevator would not only be endangered but rendered inoperative in so faras the occupants of the car were concerned.

Hence I provide suitable means adapted to be manually controlled withinthe car, and auxiliary to the usual extraneous automatic safety means,whereby, in case of emergency, the car may be effectually controlledthrough the medium of an auxiliary brake mechanism adapted to act inconjunction with the governor rope of the or dinary safety mechanism,and whereas also the power may be shut oft or applied according tocircumstances and requirements,l all as hereinafter fully set forth,-theinvention consisting essentially in the specific combination andarrangement of devices and appurtenances described and claimed wherebythese and other advantageous results are attained, and distinctivefeatures being the control of an auxiliary brake device but duplexemergency means, one electrical and the other mechanical, whereby thesetting of the auxiliary brake also cuts out the motor, which is subjectto control and reinstatement by an independent electrical circuit, sothat practically, to all intents and purposes, the car is self-containedin this respect, and may be safe-guarded and maniplated independent ofthe usual automatic governor-controlled mechanism.

In the accompanying drawings I illustrate more or less diagrammaticallythe practical embodiment of the essential features of my invention,although I do not wish to restrict myself to the identical form andconstruction of device, parts and appurtenances shown by way ofexemplification, since modifications may be made in minor details, andequivalent mechanical expedients resorted to with like results, andwithout departing from the spirit and intent of my invention in thisrespect.

With this understanding Fig. l, represents an elevator car and wellknown automatic governor-control mechanism used in conjunctiontherewith, the

brakes;

1924. Serial No. 721,151.

car being also provided with my auxiliary safety control means;

Fig. 2, is aview of the underside of the car, showing one of the usualguard rail Fig. 3, is a view of the casing of the auxiliary brake,broken away in part to show said brake device in detail, in elevation;

Fig. 4, is a horizontal sectional elevation taken upon plane of line4--1 Fig. 3.

The car C, is supportedand raised and lowered normally by any suitableor well lino-wn means, not shown, the same forming no part of myinvention. R, R, are the usual flange guide rails; G, the usual governorrope vconnected above with the customary governor-control mechanism G1,and below with the usual weighted sheave G2. g, is the tension ropeconnecting the governor rope G, with the usual guide rail blocks g, g,underneath the car in a manner well 1nnown in the prior state of theart, as illustrated in Fig. 2.

B, is my auxiliary brake arranged to engage, upon occasion, with astrand of the governor rope G, which extends through the casing K, inwhich the brake B, is pivotally mounted, said casing K, being formedwith a semi-circular bearing groove lo, for the accommodation of thegovernor rope G, as will be understood by reference more particularly toFigs. 3 and 4, of the drawings. The brake B, is held normallyv fromcontact with the rope G, by a retractile spring 7a as shown particularlyin Fig. 3, of the drawings; and the brake-actuating cam or eccentric E,is held normally out of contact with the brake B, by a spring e,interposed between a shoul! der e on the eccentric rod e2, and a fixedpart k2. of the casing K, as indicated in Fig. 3.

The eccentric rod e2, extends through a solenoid S, said rod beingprovided with or formed to function as the core of said solenoid S, andthe extension of said rod e?, below the solenoid S. being formed with acam protuberance e3, for contractual engage ment with a switch a,adapted to open the electrical circuit af, a', when the brake-actuatingrod e2, is depressedsaidelectrical circuit a, a. controlling the motorpower 'circuit as indicated diagramatically in the lower part of Fig. l,of the drawings.

The auxiliary brake B, may also be actuated through the medium of ahandle e, connected by a flexible cord or equivalent e5, with theaforesaid rod e2, as indicated in Fig. 1,013 the drawings, so thatalternative means are thus provided for applying` the emergency brake B,and opening the power circuit.

In order to positively etliect the re-olosing of the motor power circuitupon the release of the auxiliary brake B, I provide an auX- iliaryelectrical circuit a2, a2, c-losable upon occasion by a press button a,whereby the parts and connections may be restored to normalrelationship.

In use in emergency the auxiliary brake B, may be applied by eitherpressing the button s', thereby closing the circuit s, s, of thesolenoid S, and actuating the rod e2, or the same result may be attainedby means of the handle e4, should the solenoid S, fail to function forany reason.

Heretofore in case of accident or impairment of the governor-controlmechanism, the occupants of the car have been comparatively helpless,having to rely on extraneous assistance, whereas by my invention the carcan be manipulated etliectually from within in case of necessity.Furthermore, my safety mechanism and appurtenances may be tested outfrom time to Vtime with` out injury, and withoutthe necessity fordismantling of the car or parts involved,-a result not heretoforeattained in safety appliances for elevators of the character designated.

l/Vhat I claim as my invention and desire to secure by Letters Patent,is

l. In combination with an elevator of the character designated, anauxiliary brake po` sitioned on Vthe car, and adapted to engage with astrand of the governor rope, together with means for actuating saidauxiliary brake electro-magnetically, and means connected with saidauxiliary bralrefor opening` the motorpower circuit, substantially inthe manner and for the purpose set forth.

2. In combination with an elevator oi' the character designated,lanauxiliary brake positioned on the car and adapted to engage with astrand of the governor rope, means for actuating said auxiliary brakeelectromaninetically` means 'connected with said auxiliary brake foropening the motor power circuit, and independent electrical means forclosing said motor power circuit, substantially in the manner and forlt-he'purpose set forth. i

ABRAHAM sroLLER.

